Wiktionary
vb. (context idiomatic English) To make an extra effort; to do a particularly good job.
Usage examples of "go the extra mile".
We take pride in our zero turnover rate, and we go the extra mile to keep careers on track.
Thanks again for your wisdom and candor, your willingness to go the extra mile, and most of all for your friendship.
You do your job, do what's expected of you, and go the extra mile.
The school principal says he gets along great with everyone, always willing to go the extra mile, really does care about the school and the students.
He wanted to make it clear to Tornson right away that he would not only make amends, he would go the extra mile.
Which was why he was sitting alone at a restaurant table and gazing at the backs of two guys twenty feet away and wondering if it would be enough just to warn them off or if he would have to go the extra mile and break their arms.
Another dealer will be willing to go the extra mile to sell me a vehicle, I'm sure, especially when no one knows what tomorrow may bring.